Video capturing Prog for windows?

hi i need a program that i can use to make a mpeg video off my computer like i want to make a video guide on how to use bidpay and i was wondering if any one can guide to the best progam free or free trial to do this with

i need it so it can record what im doing on my computer like if i was recording it with a camcorder so others can see it

like this for example how they made this mov file of how to use outlook express

http://video.yahoo.com/video/play?_adv_prop=video&va=outlook+express&ei=UTF-8&b=16&oid=dee724abec43dc12&rurl=dti.uniandes.edu.co&vdone=http%3A%2F%2Fvideo.yahoo.com%2Fvideo%2Fsearch%3F_adv_prop%3Dvideo%26va%3Doutlook%2Bexpress%26ei%3DUTF-8%26b%3D11

Have a look here and see if it meets your goals:

http://www.debugmode.com/wink/

http://graphicssoft.about.com/od/screencapture/gr/wink.htm

http://codex.gallery2.org/index.php/Codex:How_to_Create_a_Wink_Tutorial